Hi all,
Can you please give me the explanation of this two questions:
1. How many integers n greater then 10 and less then 100 are these such that, if the digits of n are reversed, the resulting integer is n-9?
A) 5
B) 6
C) 7
D) 8
E) 9
2. If x, y, and z are single-digit integers and 100(x) + 1,000(y) +10(z)=N, what is the units' digit of the number N?
A) 0
B) 1
C) x
D) y
E) z
Thanks!!!
Can you please give me the explanation of this two questions:
1. How many integers n greater then 10 and less then 100 are these such that, if the digits of n are reversed, the resulting integer is n-9?
A) 5
B) 6
C) 7
D) 8
E) 9
2. If x, y, and z are single-digit integers and 100(x) + 1,000(y) +10(z)=N, what is the units' digit of the number N?
A) 0
B) 1
C) x
D) y
E) z
Thanks!!!
